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Finding the Fourth Proportional to 76,043.90, 104,931.42 and 42,047.80

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Solution

The fourth proportional to 76,043.90, 104,931.42 and 42,047.80 is: 58,020.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,043.90 : 104,931.42 = 42,047.80 : x
  2. Step 2: Convert to fraction form
    76,043.90/104,931.42 = 42,047.80/x
  3. Step 3: Cross multiply
    76,043.90x = 104,931.42 × 42,047.80
  4. Step 4: Simplify right side
    76,043.90x = 4,412,135,361.88
  5. Step 5: Solve for x
    x = 4,412,135,361.88/76,043.90
  6. Step 6: Final answer
    x = 58,020.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.